Airtac STA Single Acting Compact Guided Cylinder STA20X30B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X30B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 30mm stroke. Air pulles the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ20 mm
- Stroke30 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA20X30B
The AirTAC STA20X30B is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it. It provides 108.9 N of net pull at 0.5 MPa and 161.7 N at 0.7 MPa. This bore uses an 8 mm piston rod and an M5x0.8 air port, needing at least 0.2 MPa operating pressure to overcome the return spring.
Featuring the -B option, this unit has a male M6x1.0 threaded rod end instead of the standard female M4x0.7. Its short riveted body saves axial mounting depth where larger profile cylinders will not fit. A fixed NBR bumper decelerates the stroke end, but it does not lock or hold a mid-stroke load without live air pressure.
Airtac STA Single Acting Compact Guided Cylinder STA20X30B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X30B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø20mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 109 N |
| 0.7 MPa | 162 N |
These are NET output forces — the return-spring force is already deducted. Single-acting pull only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac STA Single Acting Compact Guided Cylinder STA20X30B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×30 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac STA Single Acting Compact Guided Cylinder STA20X30B Is Used
Tension Gate Return
Uses the 108.9 N net pull to draw a diverter gate inward against belt vibration, letting the spring reliably push it back open when the air line vents.
Film Clamp Release
Pulls a clamping jaw out of the way during packaging film changes, with the internal spring ensuring the jaw extends safely if pneumatic pressure drops.
Light Cover Lift
Retracts a 5.6 kg machine guard cover vertically using the male M6x1.0 rod, relying on the compact riveted body to fit within tight overhead clearances.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X30B the Right Cylinder?
When sizing this 20 mm bore, consider the STA16 which yields 66.4 N net pull at 0.5 MPa, or step up to the STA25 for 177.7 N. This STA20X30B provides a safe working load of roughly 65 N, or a vertical lift capacity of about 5.6 kg with a 2:1 safety margin. It hits the 30 mm maximum standard stroke ceiling for the series.
Because it is spring-extended, the rod drives outward upon air loss and cannot maintain an intermediate position. This specific SKU lacks the -S magnet, so position sensing is not possible without the variant. Confirm your requirements for the M5x0.8 port, male M6x1.0 rod thread, and 50-500 mm/s speed range before ordering.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac STA Single Acting Compact Guided Cylinder STA20X30B FAQ
The net pull force is 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, with a minimum of 0.2 MPa needed to overcome the internal return spring.
No, this specific SKU does not have the -S option, meaning it lacks a piston magnet and cannot accept reed or electronic switches. You would need the -S variant to enable sensing.
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